38 Questions
Big bang integration testing involves integrating and testing individual modules one by one.
False
The incremental approach to integration testing involves integrating and testing all components at once.
False
The big bang approach is typically used when there is ample time to deliver the software product.
False
The incremental approach includes the top-down, bottom-up, and sandwich approaches.
True
Big bang integration testing is used when it is practical to test all components together incrementally.
False
The big bang approach is used when the system to be tested is simple and small.
False
In Incremental Integration Testing, the risk of encountering catastrophic failures is increased.
False
Top-down approach involves testing high-level components first and then moving to lower-level components.
True
The hybrid approach is similar to the bottom-up approach.
False
Low-level components are at the top of the system hierarchy.
False
Incremental Integration Testing involves testing the entire system at once.
False
The hybrid approach involves testing low-level components first and then moving to higher-level components.
False
QA managers can choose which module to test first based on resource availability.
True
Unit tests are used to verify the functionality of an entire application.
False
Incremental Integration Testing does not require thorough planning beforehand.
False
In the assertions phase, you verify that the output matches the expected behavior.
True
The expect function is used to invoke a function or method with specific inputs.
False
Unit tests are typically written in the same file as the code being tested.
False
A Calculator class is a built-in class in Flutter.
False
The command line is used to write unit tests for a Calculator class.
False
If all tests pass, it indicates that the Calculator class's methods are not functioning as expected.
False
Unit tests are optional and can be skipped when developing a Flutter application.
False
The bottom-up approach is used when the critical functionalities are primarily concentrated in the higher-level components.
False
Defect localization is a crucial aspect of a project that uses the top-down approach.
False
The hybrid approach combines the advantages of the big bang and incremental approaches.
False
The top-down approach is used when the lower-level modules are more well-defined, stable, and unlikely to change significantly.
True
The bottom-up approach provides a more holistic view of the system's behavior early on.
False
The hybrid approach is used when the system to be tested is simple and small.
False
The top-down approach allows for faster validation of user-facing features, enabling early prototypes for user feedback.
True
The bottom-up approach is used when higher-level modules are still under development or likely to change frequently.
True
Sandwich testing is only used for small and simple systems.
False
The sandwich approach can be used to test both functional and non-functional aspects of a system.
True
The hybrid approach is another name for the big bang approach.
False
Sandwich testing is a time-consuming approach.
False
The sandwich approach requires minimal use of stubs and drivers.
False
Sandwich testing can be used for systems with complex dependencies and algorithms.
True
The sandwich approach is a well-defined process that cannot be easily repeated and documented.
False
Sandwich testing is not suitable for systems with a lot of interdependence between different modules.
True
Study Notes
Unit Testing
- In unit testing, a function or method is invoked with specific inputs and the output is captured.
- The output is then verified using assertions to ensure it meets the expected behavior.
- Flutter provides various assertion functions to assert the correctness of the code.
Unit Testing in Flutter
- Create a Calculator class with methods for addition, subtraction, multiplication, and division.
- Write unit tests for each method in the Calculator class.
- Run the tests using the command line and check the output to ensure all tests pass.
Integration Testing
- Integration testing involves combining multiple units to ensure they work together seamlessly.
- There are two main approaches to integration testing: Big Bang and Incremental.
Big Bang Integration Testing
- Involves integrating all components or modules and testing as a single unit.
- Typically used when there is a tight deadline and all development teams are working in parallel.
- Can be used when the system is too complex or large to test in parts.
Incremental Integration Testing
- Involves integrating components incrementally, either from the bottom up or top down.
- Bottom-up approach: test low-level components first, then move to higher-level components.
- Top-down approach: test high-level components first, then move to lower-level components.
- Hybrid (Sandwich) approach: combines bottom-up and top-down approaches.
Bottom-up Approach
- Used when complexity is primarily found in lower-level modules.
- Used when defect localization is crucial and higher-level modules are still under development.
Top-down Approach
- Used when critical functionalities are primarily concentrated in higher-level components.
- Used when simulating real-world scenarios and user interactions is crucial.
Hybrid (Sandwich) Approach
- Combines the advantages of bottom-up and top-down approaches.
- Uses stubs and drivers to simulate the behavior of missing components.
- Consists of three steps: testing the user interface in isolation, testing low-level functions, and integrating the complete system.
Advantages of Sandwich Testing
- Can be used in very large projects with subprojects.
- Allows parallel testing.
- Is a time-saving approach.
- Performs more coverage with same stubs.
- Can be used to test both functional and non-functional aspects of a system.
Disadvantages of Sandwich Testing
- Cannot be used for systems with a lot of interdependence between modules.
- Requires a high need for stubs and drivers.
- Is expensive to set up and maintain the necessary infrastructure.
- May not be representative of the production environment, leading to inaccurate results.
- Is prone to human error when manually transferring data between environments.
Understanding unit testing in Flutter, executing functions and verifying output against expected behavior.
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